./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02d2a7ecaeb1f9a3fd2c207ee063800bfd7475435ba7bc7e95648b1704092bfe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 23:28:32,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 23:28:32,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 23:28:32,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 23:28:32,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 23:28:32,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 23:28:32,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 23:28:32,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 23:28:32,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 23:28:32,684 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 23:28:32,684 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 23:28:32,684 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 23:28:32,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 23:28:32,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 23:28:32,687 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 23:28:32,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 23:28:32,688 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 23:28:32,688 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 23:28:32,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 23:28:32,689 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 23:28:32,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 23:28:32,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 23:28:32,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 23:28:32,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 23:28:32,695 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 23:28:32,695 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 23:28:32,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 23:28:32,696 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 23:28:32,696 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 23:28:32,696 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 23:28:32,696 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 23:28:32,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 23:28:32,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 23:28:32,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 23:28:32,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 23:28:32,697 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 23:28:32,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 23:28:32,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 23:28:32,698 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 23:28:32,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 23:28:32,699 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 23:28:32,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 23:28:32,700 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02d2a7ecaeb1f9a3fd2c207ee063800bfd7475435ba7bc7e95648b1704092bfe [2024-11-09 23:28:32,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 23:28:32,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 23:28:32,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 23:28:32,954 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 23:28:32,954 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 23:28:32,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c [2024-11-09 23:28:34,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 23:28:34,590 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 23:28:34,591 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c [2024-11-09 23:28:34,601 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650cee1a3/9d7a20459c7f4907a0f25f3529e07f70/FLAG809c3e96d [2024-11-09 23:28:34,976 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650cee1a3/9d7a20459c7f4907a0f25f3529e07f70 [2024-11-09 23:28:34,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 23:28:34,979 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 23:28:34,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 23:28:34,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 23:28:34,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 23:28:34,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:28:34" (1/1) ... [2024-11-09 23:28:34,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a31c40a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:34, skipping insertion in model container [2024-11-09 23:28:34,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:28:34" (1/1) ... [2024-11-09 23:28:35,009 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 23:28:35,187 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c[987,1000] [2024-11-09 23:28:35,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 23:28:35,270 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 23:28:35,305 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5-ll.c[987,1000] [2024-11-09 23:28:35,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 23:28:35,347 INFO L204 MainTranslator]: Completed translation [2024-11-09 23:28:35,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35 WrapperNode [2024-11-09 23:28:35,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 23:28:35,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 23:28:35,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 23:28:35,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 23:28:35,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,367 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,392 INFO L138 Inliner]: procedures = 16, calls = 74, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2024-11-09 23:28:35,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 23:28:35,393 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 23:28:35,393 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 23:28:35,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 23:28:35,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,408 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,427 INFO L175 MemorySlicer]: Split 51 memory accesses to 5 slices as follows [2, 4, 5, 36, 4]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2024-11-09 23:28:35,431 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,431 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,440 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 23:28:35,453 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 23:28:35,453 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 23:28:35,453 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 23:28:35,454 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (1/1) ... [2024-11-09 23:28:35,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 23:28:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:35,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 23:28:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 23:28:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 23:28:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 23:28:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 23:28:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 23:28:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-09 23:28:35,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-09 23:28:35,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 23:28:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 23:28:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 23:28:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 23:28:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-09 23:28:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-09 23:28:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 23:28:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 23:28:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 23:28:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 23:28:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 23:28:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-09 23:28:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-09 23:28:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 23:28:35,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 23:28:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2024-11-09 23:28:35,544 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2024-11-09 23:28:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 23:28:35,653 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 23:28:35,656 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 23:28:35,793 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L73: call ULTIMATE.dealloc(main_~#k~0#1.base, main_~#k~0#1.offset);havoc main_~#k~0#1.base, main_~#k~0#1.offset;call ULTIMATE.dealloc(main_~#y~0#1.base, main_~#y~0#1.offset);havoc main_~#y~0#1.base, main_~#y~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset; [2024-11-09 23:28:35,878 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-09 23:28:35,878 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 23:28:35,888 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 23:28:35,888 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 23:28:35,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 11:28:35 BoogieIcfgContainer [2024-11-09 23:28:35,888 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 23:28:35,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 23:28:35,890 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 23:28:35,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 23:28:35,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 11:28:34" (1/3) ... [2024-11-09 23:28:35,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d43e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:28:35, skipping insertion in model container [2024-11-09 23:28:35,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:28:35" (2/3) ... [2024-11-09 23:28:35,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d43e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:28:35, skipping insertion in model container [2024-11-09 23:28:35,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 11:28:35" (3/3) ... [2024-11-09 23:28:35,897 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps5-ll.c [2024-11-09 23:28:35,912 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 23:28:35,912 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 23:28:35,967 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 23:28:35,975 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f09b6c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 23:28:35,977 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 23:28:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:28:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 23:28:35,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:35,986 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:35,987 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:35,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1380224126, now seen corresponding path program 1 times [2024-11-09 23:28:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:36,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793391509] [2024-11-09 23:28:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 23:28:36,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:36,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793391509] [2024-11-09 23:28:36,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793391509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:28:36,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:28:36,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 23:28:36,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833765219] [2024-11-09 23:28:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:28:36,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 23:28:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 23:28:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 23:28:36,216 INFO L87 Difference]: Start difference. First operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 23:28:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:36,232 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2024-11-09 23:28:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 23:28:36,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 23:28:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:36,239 INFO L225 Difference]: With dead ends: 53 [2024-11-09 23:28:36,239 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 23:28:36,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 23:28:36,246 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:36,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:28:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 23:28:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 23:28:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 23:28:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 23:28:36,282 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 12 [2024-11-09 23:28:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:36,282 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 23:28:36,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 23:28:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 23:28:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 23:28:36,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:36,283 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:36,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 23:28:36,284 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:36,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1576737631, now seen corresponding path program 1 times [2024-11-09 23:28:36,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:36,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255591684] [2024-11-09 23:28:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108641697] [2024-11-09 23:28:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:36,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:36,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:36,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:36,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 23:28:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:36,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 23:28:36,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:36,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:36,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 23:28:36,768 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 23:28:36,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255591684] [2024-11-09 23:28:36,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108641697] [2024-11-09 23:28:36,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108641697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:28:36,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:28:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 23:28:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121758121] [2024-11-09 23:28:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:28:36,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 23:28:36,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 23:28:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 23:28:36,774 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 23:28:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:36,965 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-11-09 23:28:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 23:28:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 23:28:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:36,969 INFO L225 Difference]: With dead ends: 39 [2024-11-09 23:28:36,969 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 23:28:36,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 23:28:36,971 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:36,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:28:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 23:28:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-09 23:28:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 23:28:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-09 23:28:36,986 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2024-11-09 23:28:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:36,986 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-09 23:28:36,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 23:28:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-09 23:28:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 23:28:36,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:36,987 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:37,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:37,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:37,188 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:37,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1371998984, now seen corresponding path program 1 times [2024-11-09 23:28:37,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:37,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369995027] [2024-11-09 23:28:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:37,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798638602] [2024-11-09 23:28:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:37,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:37,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:37,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 23:28:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:37,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 23:28:37,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:37,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:37,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:37,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-11-09 23:28:37,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 23:28:37,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 23:28:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369995027] [2024-11-09 23:28:38,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:38,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798638602] [2024-11-09 23:28:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798638602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:28:38,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 23:28:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-09 23:28:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010239498] [2024-11-09 23:28:38,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:38,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 23:28:38,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 23:28:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-09 23:28:38,113 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 23:28:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:38,625 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2024-11-09 23:28:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 23:28:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-09 23:28:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:38,628 INFO L225 Difference]: With dead ends: 67 [2024-11-09 23:28:38,629 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 23:28:38,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-09 23:28:38,632 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:38,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 181 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 23:28:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 23:28:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2024-11-09 23:28:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-09 23:28:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-09 23:28:38,658 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2024-11-09 23:28:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:38,659 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-09 23:28:38,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 23:28:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-09 23:28:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 23:28:38,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:38,660 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:38,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:38,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 23:28:38,861 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:38,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash -84651788, now seen corresponding path program 1 times [2024-11-09 23:28:38,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979188721] [2024-11-09 23:28:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:38,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:38,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456749332] [2024-11-09 23:28:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:38,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:38,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:38,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 23:28:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:38,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 23:28:38,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:38,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:39,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 23:28:39,092 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 23:28:39,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:39,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979188721] [2024-11-09 23:28:39,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:39,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456749332] [2024-11-09 23:28:39,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456749332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:28:39,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:28:39,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 23:28:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003503953] [2024-11-09 23:28:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:28:39,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 23:28:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 23:28:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 23:28:39,095 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 23:28:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:39,234 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-11-09 23:28:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 23:28:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-09 23:28:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:39,237 INFO L225 Difference]: With dead ends: 63 [2024-11-09 23:28:39,237 INFO L226 Difference]: Without dead ends: 60 [2024-11-09 23:28:39,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 23:28:39,238 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:39,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:28:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-09 23:28:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-09 23:28:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-09 23:28:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-11-09 23:28:39,255 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 22 [2024-11-09 23:28:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:39,256 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-11-09 23:28:39,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 23:28:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-11-09 23:28:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 23:28:39,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:39,258 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:39,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 23:28:39,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:39,459 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:39,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1307497122, now seen corresponding path program 1 times [2024-11-09 23:28:39,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39871891] [2024-11-09 23:28:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:39,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796575769] [2024-11-09 23:28:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:39,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:39,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:39,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 23:28:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:39,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 23:28:39,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:39,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 23:28:39,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 23:28:39,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:39,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:39,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 23:28:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 23:28:39,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:40,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39871891] [2024-11-09 23:28:40,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:40,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796575769] [2024-11-09 23:28:40,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796575769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:40,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-09 23:28:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677929881] [2024-11-09 23:28:40,514 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:40,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 23:28:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 23:28:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-09 23:28:40,515 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 23:28:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:40,903 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2024-11-09 23:28:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 23:28:40,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2024-11-09 23:28:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:40,905 INFO L225 Difference]: With dead ends: 68 [2024-11-09 23:28:40,905 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 23:28:40,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-09 23:28:40,906 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:40,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 61 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 23:28:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 23:28:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 23:28:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-09 23:28:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-09 23:28:40,922 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2024-11-09 23:28:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:40,922 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-09 23:28:40,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 23:28:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-09 23:28:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 23:28:40,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:40,924 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:40,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:41,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:41,130 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:41,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2092822125, now seen corresponding path program 1 times [2024-11-09 23:28:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541359264] [2024-11-09 23:28:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:41,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783366829] [2024-11-09 23:28:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:41,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:41,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:41,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:41,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 23:28:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:41,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 23:28:41,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:41,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:41,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:41,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:41,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 23:28:41,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:42,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2024-11-09 23:28:42,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 23:28:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541359264] [2024-11-09 23:28:43,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783366829] [2024-11-09 23:28:43,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783366829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:43,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:43,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-11-09 23:28:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220777777] [2024-11-09 23:28:43,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:43,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 23:28:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 23:28:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-09 23:28:43,167 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 13 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 23:28:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:43,446 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2024-11-09 23:28:43,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 23:28:43,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2024-11-09 23:28:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:43,447 INFO L225 Difference]: With dead ends: 61 [2024-11-09 23:28:43,447 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 23:28:43,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-09 23:28:43,448 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:43,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 101 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 23:28:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 23:28:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-11-09 23:28:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-09 23:28:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-11-09 23:28:43,460 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2024-11-09 23:28:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:43,461 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-11-09 23:28:43,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 23:28:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-11-09 23:28:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 23:28:43,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:43,462 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:43,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 23:28:43,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:43,663 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:43,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1811039555, now seen corresponding path program 1 times [2024-11-09 23:28:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:43,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049484627] [2024-11-09 23:28:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:43,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105263760] [2024-11-09 23:28:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:43,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:43,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:43,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 23:28:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:43,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-09 23:28:43,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:43,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 23:28:43,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:43,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:44,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 23:28:44,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 23:28:44,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:45,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2024-11-09 23:28:45,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-11-09 23:28:45,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049484627] [2024-11-09 23:28:45,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:45,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105263760] [2024-11-09 23:28:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105263760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:45,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:45,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-09 23:28:45,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513560434] [2024-11-09 23:28:45,427 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:45,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 23:28:45,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 23:28:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-11-09 23:28:45,428 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:28:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:45,947 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-09 23:28:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 23:28:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2024-11-09 23:28:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:45,949 INFO L225 Difference]: With dead ends: 66 [2024-11-09 23:28:45,949 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 23:28:45,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2024-11-09 23:28:45,950 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:45,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 330 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 23:28:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 23:28:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-09 23:28:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 23:28:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-09 23:28:45,960 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 40 [2024-11-09 23:28:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:45,960 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-09 23:28:45,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:28:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-09 23:28:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 23:28:45,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:45,962 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:45,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:46,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:46,163 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:46,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:46,163 INFO L85 PathProgramCache]: Analyzing trace with hash 862788594, now seen corresponding path program 2 times [2024-11-09 23:28:46,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:46,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107420663] [2024-11-09 23:28:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:46,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010977376] [2024-11-09 23:28:46,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:28:46,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:46,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:28:46,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 23:28:46,446 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:28:46,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:28:46,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 182 conjuncts are in the unsatisfiable core [2024-11-09 23:28:46,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:46,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 23:28:46,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:46,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:46,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:46,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 23:28:47,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:47,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 23:28:47,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:29:01,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 47 [2024-11-09 23:29:01,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-11-09 23:29:01,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-11-09 23:29:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:29:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107420663] [2024-11-09 23:29:11,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:29:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010977376] [2024-11-09 23:29:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010977376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:29:11,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:29:11,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-09 23:29:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373264890] [2024-11-09 23:29:11,135 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:29:11,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 23:29:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:29:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 23:29:11,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=626, Unknown=3, NotChecked=0, Total=702 [2024-11-09 23:29:11,138 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:29:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:29:12,025 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-09 23:29:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 23:29:12,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2024-11-09 23:29:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:29:12,026 INFO L225 Difference]: With dead ends: 59 [2024-11-09 23:29:12,026 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 23:29:12,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=115, Invalid=938, Unknown=3, NotChecked=0, Total=1056 [2024-11-09 23:29:12,027 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 23:29:12,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 96 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 23:29:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 23:29:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-09 23:29:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-09 23:29:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-11-09 23:29:12,038 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 46 [2024-11-09 23:29:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:29:12,039 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-11-09 23:29:12,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:29:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-11-09 23:29:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 23:29:12,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:29:12,040 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:29:12,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 23:29:12,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:29:12,241 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:29:12,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:29:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash 285589521, now seen corresponding path program 3 times [2024-11-09 23:29:12,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:29:12,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120032162] [2024-11-09 23:29:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:29:12,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:29:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:29:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671643646] [2024-11-09 23:29:12,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 23:29:12,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:29:12,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:29:12,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:29:12,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 23:29:12,650 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 23:29:12,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:29:12,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 233 conjuncts are in the unsatisfiable core [2024-11-09 23:29:12,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:29:12,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 23:29:12,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:29:12,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:29:12,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:29:13,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 23:29:13,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:29:13,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:29:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 23:29:14,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:29:19,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 95 [2024-11-09 23:29:19,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2024-11-09 23:29:21,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 39 [2024-11-09 23:29:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:29:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120032162] [2024-11-09 23:29:26,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:29:26,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671643646] [2024-11-09 23:29:26,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671643646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:29:26,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:29:26,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 23:29:26,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63039634] [2024-11-09 23:29:26,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:29:26,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 23:29:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:29:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 23:29:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2024-11-09 23:29:26,709 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 23:29:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:29:28,445 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2024-11-09 23:29:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 23:29:28,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2024-11-09 23:29:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:29:28,448 INFO L225 Difference]: With dead ends: 67 [2024-11-09 23:29:28,450 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 23:29:28,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 23:29:28,452 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 23:29:28,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 108 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 23:29:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 23:29:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-11-09 23:29:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-09 23:29:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-11-09 23:29:28,464 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 58 [2024-11-09 23:29:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:29:28,464 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-11-09 23:29:28,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 23:29:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-11-09 23:29:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 23:29:28,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:29:28,466 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:29:28,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 23:29:28,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 23:29:28,667 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:29:28,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:29:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2094510608, now seen corresponding path program 4 times [2024-11-09 23:29:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:29:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870163408] [2024-11-09 23:29:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:29:28,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:29:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:29:28,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943836295] [2024-11-09 23:29:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 23:29:28,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:29:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:29:28,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 23:29:28,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 23:29:29,063 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 23:29:29,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:29:29,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-11-09 23:29:29,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:29:29,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:29:29,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:29:29,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:29:29,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:29:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 23:29:29,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:29:39,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2024-11-09 23:29:39,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 23:30:05,960 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_24| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_27| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_27| Int)) (or (not (let ((.cse5 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|))) (let ((.cse3 (select .cse5 |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse2 (+ .cse3 3))) (let ((.cse0 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base| (store .cse5 |c_func_to_recursive_line_27_to_35_0_#in~y.offset| .cse2)) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_27|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_27|))) (= (+ (* 6 (* .cse0 .cse0 .cse0 .cse0 .cse0)) (* 15 (* .cse0 .cse0 .cse0 .cse0)) (* (* .cse0 .cse0 .cse0) 10)) (+ .cse0 (* 30 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_27_to_35_0_#in~x.base| (let ((.cse1 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_27_to_35_0_#in~x.base|))) (store .cse1 |c_func_to_recursive_line_27_to_35_0_#in~x.offset| (let ((.cse4 (+ .cse3 1))) (+ (* .cse2 .cse2 .cse2 .cse2) (* .cse3 8) (* .cse4 .cse4 .cse4 .cse4) 6 (* 4 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3) (* (* .cse4 .cse4 .cse4) 4) (select .cse1 |c_func_to_recursive_line_27_to_35_0_#in~x.offset|) (* 6 (* .cse3 .cse3)) (* 6 (* .cse4 .cse4))))))) |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_24|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_24|))))))))) (let ((.cse10 (select |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base))) (let ((.cse8 (select .cse10 c_func_to_recursive_line_27_to_35_0_~y.offset))) (let ((.cse9 (+ .cse8 2))) (let ((.cse6 (select (select (store |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base (store .cse10 c_func_to_recursive_line_27_to_35_0_~y.offset .cse9)) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_27|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_27|))) (= (+ .cse6 (* 30 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_27_to_35_0_~x.base (let ((.cse7 (select |c_#memory_int#2| c_func_to_recursive_line_27_to_35_0_~x.base))) (store .cse7 c_func_to_recursive_line_27_to_35_0_~x.offset (+ (* .cse8 .cse8 .cse8 .cse8) (select .cse7 c_func_to_recursive_line_27_to_35_0_~x.offset) (* .cse9 .cse9 .cse9 .cse9) (* 6 (* .cse8 .cse8)) (* (* .cse8 .cse8 .cse8) 4) 1 (* .cse8 4))))) |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_24|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_24|))) (+ (* 6 (* .cse6 .cse6 .cse6 .cse6 .cse6)) (* (* .cse6 .cse6 .cse6) 10) (* (* .cse6 .cse6 .cse6 .cse6) 15))))))))) is different from false [2024-11-09 23:30:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:30:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870163408] [2024-11-09 23:30:05,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:30:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943836295] [2024-11-09 23:30:05,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943836295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:30:05,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:30:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-09 23:30:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779252945] [2024-11-09 23:30:05,970 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:30:05,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 23:30:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:30:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 23:30:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=4, NotChecked=42, Total=552 [2024-11-09 23:30:05,971 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 23:30:11,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []